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-rw-r--r--kernel/trace/ftrace.c33
-rw-r--r--kernel/trace/ring_buffer.c179
-rw-r--r--kernel/trace/ring_buffer_benchmark.c5
-rw-r--r--kernel/trace/trace.c127
-rw-r--r--kernel/trace/trace.h27
-rw-r--r--kernel/trace/trace_functions_graph.c169
-rw-r--r--kernel/trace/trace_irqsoff.c271
-rw-r--r--kernel/trace/trace_output.c2
-rw-r--r--kernel/trace/trace_sched_switch.c5
-rw-r--r--kernel/trace/trace_sched_wakeup.c5
-rw-r--r--kernel/trace/trace_selftest.c7
11 files changed, 677 insertions, 153 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 2404b59b3097..32837e19e3bd 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -264,6 +264,7 @@ struct ftrace_profile {
264 unsigned long counter; 264 unsigned long counter;
265#ifdef CONFIG_FUNCTION_GRAPH_TRACER 265#ifdef CONFIG_FUNCTION_GRAPH_TRACER
266 unsigned long long time; 266 unsigned long long time;
267 unsigned long long time_squared;
267#endif 268#endif
268}; 269};
269 270
@@ -366,9 +367,9 @@ static int function_stat_headers(struct seq_file *m)
366{ 367{
367#ifdef CONFIG_FUNCTION_GRAPH_TRACER 368#ifdef CONFIG_FUNCTION_GRAPH_TRACER
368 seq_printf(m, " Function " 369 seq_printf(m, " Function "
369 "Hit Time Avg\n" 370 "Hit Time Avg s^2\n"
370 " -------- " 371 " -------- "
371 "--- ---- ---\n"); 372 "--- ---- --- ---\n");
372#else 373#else
373 seq_printf(m, " Function Hit\n" 374 seq_printf(m, " Function Hit\n"
374 " -------- ---\n"); 375 " -------- ---\n");
@@ -384,6 +385,7 @@ static int function_stat_show(struct seq_file *m, void *v)
384 static DEFINE_MUTEX(mutex); 385 static DEFINE_MUTEX(mutex);
385 static struct trace_seq s; 386 static struct trace_seq s;
386 unsigned long long avg; 387 unsigned long long avg;
388 unsigned long long stddev;
387#endif 389#endif
388 390
389 kallsyms_lookup(rec->ip, NULL, NULL, NULL, str); 391 kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
@@ -394,11 +396,25 @@ static int function_stat_show(struct seq_file *m, void *v)
394 avg = rec->time; 396 avg = rec->time;
395 do_div(avg, rec->counter); 397 do_div(avg, rec->counter);
396 398
399 /* Sample standard deviation (s^2) */
400 if (rec->counter <= 1)
401 stddev = 0;
402 else {
403 stddev = rec->time_squared - rec->counter * avg * avg;
404 /*
405 * Divide only 1000 for ns^2 -> us^2 conversion.
406 * trace_print_graph_duration will divide 1000 again.
407 */
408 do_div(stddev, (rec->counter - 1) * 1000);
409 }
410
397 mutex_lock(&mutex); 411 mutex_lock(&mutex);
398 trace_seq_init(&s); 412 trace_seq_init(&s);
399 trace_print_graph_duration(rec->time, &s); 413 trace_print_graph_duration(rec->time, &s);
400 trace_seq_puts(&s, " "); 414 trace_seq_puts(&s, " ");
401 trace_print_graph_duration(avg, &s); 415 trace_print_graph_duration(avg, &s);
416 trace_seq_puts(&s, " ");
417 trace_print_graph_duration(stddev, &s);
402 trace_print_seq(m, &s); 418 trace_print_seq(m, &s);
403 mutex_unlock(&mutex); 419 mutex_unlock(&mutex);
404#endif 420#endif
@@ -650,6 +666,10 @@ static void profile_graph_return(struct ftrace_graph_ret *trace)
650 if (!stat->hash || !ftrace_profile_enabled) 666 if (!stat->hash || !ftrace_profile_enabled)
651 goto out; 667 goto out;
652 668
669 /* If the calltime was zero'd ignore it */
670 if (!trace->calltime)
671 goto out;
672
653 calltime = trace->rettime - trace->calltime; 673 calltime = trace->rettime - trace->calltime;
654 674
655 if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) { 675 if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) {
@@ -668,8 +688,10 @@ static void profile_graph_return(struct ftrace_graph_ret *trace)
668 } 688 }
669 689
670 rec = ftrace_find_profiled_func(stat, trace->func); 690 rec = ftrace_find_profiled_func(stat, trace->func);
671 if (rec) 691 if (rec) {
672 rec->time += calltime; 692 rec->time += calltime;
693 rec->time_squared += calltime * calltime;
694 }
673 695
674 out: 696 out:
675 local_irq_restore(flags); 697 local_irq_restore(flags);
@@ -3212,8 +3234,7 @@ free:
3212} 3234}
3213 3235
3214static void 3236static void
3215ftrace_graph_probe_sched_switch(struct rq *__rq, struct task_struct *prev, 3237ftrace_graph_probe_sched_switch(struct task_struct *prev, struct task_struct *next)
3216 struct task_struct *next)
3217{ 3238{
3218 unsigned long long timestamp; 3239 unsigned long long timestamp;
3219 int index; 3240 int index;
@@ -3339,11 +3360,11 @@ void unregister_ftrace_graph(void)
3339 goto out; 3360 goto out;
3340 3361
3341 ftrace_graph_active--; 3362 ftrace_graph_active--;
3342 unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
3343 ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub; 3363 ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub;
3344 ftrace_graph_entry = ftrace_graph_entry_stub; 3364 ftrace_graph_entry = ftrace_graph_entry_stub;
3345 ftrace_shutdown(FTRACE_STOP_FUNC_RET); 3365 ftrace_shutdown(FTRACE_STOP_FUNC_RET);
3346 unregister_pm_notifier(&ftrace_suspend_notifier); 3366 unregister_pm_notifier(&ftrace_suspend_notifier);
3367 unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
3347 3368
3348 out: 3369 out:
3349 mutex_unlock(&ftrace_lock); 3370 mutex_unlock(&ftrace_lock);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 41ca394feb22..7f6059c5aa94 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -319,6 +319,11 @@ EXPORT_SYMBOL_GPL(ring_buffer_event_data);
319#define TS_MASK ((1ULL << TS_SHIFT) - 1) 319#define TS_MASK ((1ULL << TS_SHIFT) - 1)
320#define TS_DELTA_TEST (~TS_MASK) 320#define TS_DELTA_TEST (~TS_MASK)
321 321
322/* Flag when events were overwritten */
323#define RB_MISSED_EVENTS (1 << 31)
324/* Missed count stored at end */
325#define RB_MISSED_STORED (1 << 30)
326
322struct buffer_data_page { 327struct buffer_data_page {
323 u64 time_stamp; /* page time stamp */ 328 u64 time_stamp; /* page time stamp */
324 local_t commit; /* write committed index */ 329 local_t commit; /* write committed index */
@@ -338,6 +343,7 @@ struct buffer_page {
338 local_t write; /* index for next write */ 343 local_t write; /* index for next write */
339 unsigned read; /* index for next read */ 344 unsigned read; /* index for next read */
340 local_t entries; /* entries on this page */ 345 local_t entries; /* entries on this page */
346 unsigned long real_end; /* real end of data */
341 struct buffer_data_page *page; /* Actual data page */ 347 struct buffer_data_page *page; /* Actual data page */
342}; 348};
343 349
@@ -417,6 +423,12 @@ int ring_buffer_print_page_header(struct trace_seq *s)
417 (unsigned int)sizeof(field.commit), 423 (unsigned int)sizeof(field.commit),
418 (unsigned int)is_signed_type(long)); 424 (unsigned int)is_signed_type(long));
419 425
426 ret = trace_seq_printf(s, "\tfield: int overwrite;\t"
427 "offset:%u;\tsize:%u;\tsigned:%u;\n",
428 (unsigned int)offsetof(typeof(field), commit),
429 1,
430 (unsigned int)is_signed_type(long));
431
420 ret = trace_seq_printf(s, "\tfield: char data;\t" 432 ret = trace_seq_printf(s, "\tfield: char data;\t"
421 "offset:%u;\tsize:%u;\tsigned:%u;\n", 433 "offset:%u;\tsize:%u;\tsigned:%u;\n",
422 (unsigned int)offsetof(typeof(field), data), 434 (unsigned int)offsetof(typeof(field), data),
@@ -440,6 +452,8 @@ struct ring_buffer_per_cpu {
440 struct buffer_page *tail_page; /* write to tail */ 452 struct buffer_page *tail_page; /* write to tail */
441 struct buffer_page *commit_page; /* committed pages */ 453 struct buffer_page *commit_page; /* committed pages */
442 struct buffer_page *reader_page; 454 struct buffer_page *reader_page;
455 unsigned long lost_events;
456 unsigned long last_overrun;
443 local_t commit_overrun; 457 local_t commit_overrun;
444 local_t overrun; 458 local_t overrun;
445 local_t entries; 459 local_t entries;
@@ -1762,6 +1776,13 @@ rb_reset_tail(struct ring_buffer_per_cpu *cpu_buffer,
1762 kmemcheck_annotate_bitfield(event, bitfield); 1776 kmemcheck_annotate_bitfield(event, bitfield);
1763 1777
1764 /* 1778 /*
1779 * Save the original length to the meta data.
1780 * This will be used by the reader to add lost event
1781 * counter.
1782 */
1783 tail_page->real_end = tail;
1784
1785 /*
1765 * If this event is bigger than the minimum size, then 1786 * If this event is bigger than the minimum size, then
1766 * we need to be careful that we don't subtract the 1787 * we need to be careful that we don't subtract the
1767 * write counter enough to allow another writer to slip 1788 * write counter enough to allow another writer to slip
@@ -1979,17 +2000,13 @@ rb_add_time_stamp(struct ring_buffer_per_cpu *cpu_buffer,
1979 u64 *ts, u64 *delta) 2000 u64 *ts, u64 *delta)
1980{ 2001{
1981 struct ring_buffer_event *event; 2002 struct ring_buffer_event *event;
1982 static int once;
1983 int ret; 2003 int ret;
1984 2004
1985 if (unlikely(*delta > (1ULL << 59) && !once++)) { 2005 WARN_ONCE(*delta > (1ULL << 59),
1986 printk(KERN_WARNING "Delta way too big! %llu" 2006 KERN_WARNING "Delta way too big! %llu ts=%llu write stamp = %llu\n",
1987 " ts=%llu write stamp = %llu\n", 2007 (unsigned long long)*delta,
1988 (unsigned long long)*delta, 2008 (unsigned long long)*ts,
1989 (unsigned long long)*ts, 2009 (unsigned long long)cpu_buffer->write_stamp);
1990 (unsigned long long)cpu_buffer->write_stamp);
1991 WARN_ON(1);
1992 }
1993 2010
1994 /* 2011 /*
1995 * The delta is too big, we to add a 2012 * The delta is too big, we to add a
@@ -2838,6 +2855,7 @@ static struct buffer_page *
2838rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer) 2855rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2839{ 2856{
2840 struct buffer_page *reader = NULL; 2857 struct buffer_page *reader = NULL;
2858 unsigned long overwrite;
2841 unsigned long flags; 2859 unsigned long flags;
2842 int nr_loops = 0; 2860 int nr_loops = 0;
2843 int ret; 2861 int ret;
@@ -2879,6 +2897,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2879 local_set(&cpu_buffer->reader_page->write, 0); 2897 local_set(&cpu_buffer->reader_page->write, 0);
2880 local_set(&cpu_buffer->reader_page->entries, 0); 2898 local_set(&cpu_buffer->reader_page->entries, 0);
2881 local_set(&cpu_buffer->reader_page->page->commit, 0); 2899 local_set(&cpu_buffer->reader_page->page->commit, 0);
2900 cpu_buffer->reader_page->real_end = 0;
2882 2901
2883 spin: 2902 spin:
2884 /* 2903 /*
@@ -2899,6 +2918,18 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2899 rb_set_list_to_head(cpu_buffer, &cpu_buffer->reader_page->list); 2918 rb_set_list_to_head(cpu_buffer, &cpu_buffer->reader_page->list);
2900 2919
2901 /* 2920 /*
2921 * We want to make sure we read the overruns after we set up our
2922 * pointers to the next object. The writer side does a
2923 * cmpxchg to cross pages which acts as the mb on the writer
2924 * side. Note, the reader will constantly fail the swap
2925 * while the writer is updating the pointers, so this
2926 * guarantees that the overwrite recorded here is the one we
2927 * want to compare with the last_overrun.
2928 */
2929 smp_mb();
2930 overwrite = local_read(&(cpu_buffer->overrun));
2931
2932 /*
2902 * Here's the tricky part. 2933 * Here's the tricky part.
2903 * 2934 *
2904 * We need to move the pointer past the header page. 2935 * We need to move the pointer past the header page.
@@ -2929,6 +2960,11 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2929 cpu_buffer->reader_page = reader; 2960 cpu_buffer->reader_page = reader;
2930 rb_reset_reader_page(cpu_buffer); 2961 rb_reset_reader_page(cpu_buffer);
2931 2962
2963 if (overwrite != cpu_buffer->last_overrun) {
2964 cpu_buffer->lost_events = overwrite - cpu_buffer->last_overrun;
2965 cpu_buffer->last_overrun = overwrite;
2966 }
2967
2932 goto again; 2968 goto again;
2933 2969
2934 out: 2970 out:
@@ -3005,8 +3041,14 @@ static void rb_advance_iter(struct ring_buffer_iter *iter)
3005 rb_advance_iter(iter); 3041 rb_advance_iter(iter);
3006} 3042}
3007 3043
3044static int rb_lost_events(struct ring_buffer_per_cpu *cpu_buffer)
3045{
3046 return cpu_buffer->lost_events;
3047}
3048
3008static struct ring_buffer_event * 3049static struct ring_buffer_event *
3009rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts) 3050rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts,
3051 unsigned long *lost_events)
3010{ 3052{
3011 struct ring_buffer_event *event; 3053 struct ring_buffer_event *event;
3012 struct buffer_page *reader; 3054 struct buffer_page *reader;
@@ -3058,6 +3100,8 @@ rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts)
3058 ring_buffer_normalize_time_stamp(cpu_buffer->buffer, 3100 ring_buffer_normalize_time_stamp(cpu_buffer->buffer,
3059 cpu_buffer->cpu, ts); 3101 cpu_buffer->cpu, ts);
3060 } 3102 }
3103 if (lost_events)
3104 *lost_events = rb_lost_events(cpu_buffer);
3061 return event; 3105 return event;
3062 3106
3063 default: 3107 default:
@@ -3168,12 +3212,14 @@ static inline int rb_ok_to_lock(void)
3168 * @buffer: The ring buffer to read 3212 * @buffer: The ring buffer to read
3169 * @cpu: The cpu to peak at 3213 * @cpu: The cpu to peak at
3170 * @ts: The timestamp counter of this event. 3214 * @ts: The timestamp counter of this event.
3215 * @lost_events: a variable to store if events were lost (may be NULL)
3171 * 3216 *
3172 * This will return the event that will be read next, but does 3217 * This will return the event that will be read next, but does
3173 * not consume the data. 3218 * not consume the data.
3174 */ 3219 */
3175struct ring_buffer_event * 3220struct ring_buffer_event *
3176ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts) 3221ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts,
3222 unsigned long *lost_events)
3177{ 3223{
3178 struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu]; 3224 struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu];
3179 struct ring_buffer_event *event; 3225 struct ring_buffer_event *event;
@@ -3188,7 +3234,7 @@ ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
3188 local_irq_save(flags); 3234 local_irq_save(flags);
3189 if (dolock) 3235 if (dolock)
3190 spin_lock(&cpu_buffer->reader_lock); 3236 spin_lock(&cpu_buffer->reader_lock);
3191 event = rb_buffer_peek(cpu_buffer, ts); 3237 event = rb_buffer_peek(cpu_buffer, ts, lost_events);
3192 if (event && event->type_len == RINGBUF_TYPE_PADDING) 3238 if (event && event->type_len == RINGBUF_TYPE_PADDING)
3193 rb_advance_reader(cpu_buffer); 3239 rb_advance_reader(cpu_buffer);
3194 if (dolock) 3240 if (dolock)
@@ -3230,13 +3276,17 @@ ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts)
3230/** 3276/**
3231 * ring_buffer_consume - return an event and consume it 3277 * ring_buffer_consume - return an event and consume it
3232 * @buffer: The ring buffer to get the next event from 3278 * @buffer: The ring buffer to get the next event from
3279 * @cpu: the cpu to read the buffer from
3280 * @ts: a variable to store the timestamp (may be NULL)
3281 * @lost_events: a variable to store if events were lost (may be NULL)
3233 * 3282 *
3234 * Returns the next event in the ring buffer, and that event is consumed. 3283 * Returns the next event in the ring buffer, and that event is consumed.
3235 * Meaning, that sequential reads will keep returning a different event, 3284 * Meaning, that sequential reads will keep returning a different event,
3236 * and eventually empty the ring buffer if the producer is slower. 3285 * and eventually empty the ring buffer if the producer is slower.
3237 */ 3286 */
3238struct ring_buffer_event * 3287struct ring_buffer_event *
3239ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts) 3288ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts,
3289 unsigned long *lost_events)
3240{ 3290{
3241 struct ring_buffer_per_cpu *cpu_buffer; 3291 struct ring_buffer_per_cpu *cpu_buffer;
3242 struct ring_buffer_event *event = NULL; 3292 struct ring_buffer_event *event = NULL;
@@ -3257,9 +3307,11 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
3257 if (dolock) 3307 if (dolock)
3258 spin_lock(&cpu_buffer->reader_lock); 3308 spin_lock(&cpu_buffer->reader_lock);
3259 3309
3260 event = rb_buffer_peek(cpu_buffer, ts); 3310 event = rb_buffer_peek(cpu_buffer, ts, lost_events);
3261 if (event) 3311 if (event) {
3312 cpu_buffer->lost_events = 0;
3262 rb_advance_reader(cpu_buffer); 3313 rb_advance_reader(cpu_buffer);
3314 }
3263 3315
3264 if (dolock) 3316 if (dolock)
3265 spin_unlock(&cpu_buffer->reader_lock); 3317 spin_unlock(&cpu_buffer->reader_lock);
@@ -3276,23 +3328,30 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
3276EXPORT_SYMBOL_GPL(ring_buffer_consume); 3328EXPORT_SYMBOL_GPL(ring_buffer_consume);
3277 3329
3278/** 3330/**
3279 * ring_buffer_read_start - start a non consuming read of the buffer 3331 * ring_buffer_read_prepare - Prepare for a non consuming read of the buffer
3280 * @buffer: The ring buffer to read from 3332 * @buffer: The ring buffer to read from
3281 * @cpu: The cpu buffer to iterate over 3333 * @cpu: The cpu buffer to iterate over
3282 * 3334 *
3283 * This starts up an iteration through the buffer. It also disables 3335 * This performs the initial preparations necessary to iterate
3284 * the recording to the buffer until the reading is finished. 3336 * through the buffer. Memory is allocated, buffer recording
3285 * This prevents the reading from being corrupted. This is not 3337 * is disabled, and the iterator pointer is returned to the caller.
3286 * a consuming read, so a producer is not expected.
3287 * 3338 *
3288 * Must be paired with ring_buffer_finish. 3339 * Disabling buffer recordng prevents the reading from being
3340 * corrupted. This is not a consuming read, so a producer is not
3341 * expected.
3342 *
3343 * After a sequence of ring_buffer_read_prepare calls, the user is
3344 * expected to make at least one call to ring_buffer_prepare_sync.
3345 * Afterwards, ring_buffer_read_start is invoked to get things going
3346 * for real.
3347 *
3348 * This overall must be paired with ring_buffer_finish.
3289 */ 3349 */
3290struct ring_buffer_iter * 3350struct ring_buffer_iter *
3291ring_buffer_read_start(struct ring_buffer *buffer, int cpu) 3351ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu)
3292{ 3352{
3293 struct ring_buffer_per_cpu *cpu_buffer; 3353 struct ring_buffer_per_cpu *cpu_buffer;
3294 struct ring_buffer_iter *iter; 3354 struct ring_buffer_iter *iter;
3295 unsigned long flags;
3296 3355
3297 if (!cpumask_test_cpu(cpu, buffer->cpumask)) 3356 if (!cpumask_test_cpu(cpu, buffer->cpumask))
3298 return NULL; 3357 return NULL;
@@ -3306,15 +3365,52 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
3306 iter->cpu_buffer = cpu_buffer; 3365 iter->cpu_buffer = cpu_buffer;
3307 3366
3308 atomic_inc(&cpu_buffer->record_disabled); 3367 atomic_inc(&cpu_buffer->record_disabled);
3368
3369 return iter;
3370}
3371EXPORT_SYMBOL_GPL(ring_buffer_read_prepare);
3372
3373/**
3374 * ring_buffer_read_prepare_sync - Synchronize a set of prepare calls
3375 *
3376 * All previously invoked ring_buffer_read_prepare calls to prepare
3377 * iterators will be synchronized. Afterwards, read_buffer_read_start
3378 * calls on those iterators are allowed.
3379 */
3380void
3381ring_buffer_read_prepare_sync(void)
3382{
3309 synchronize_sched(); 3383 synchronize_sched();
3384}
3385EXPORT_SYMBOL_GPL(ring_buffer_read_prepare_sync);
3386
3387/**
3388 * ring_buffer_read_start - start a non consuming read of the buffer
3389 * @iter: The iterator returned by ring_buffer_read_prepare
3390 *
3391 * This finalizes the startup of an iteration through the buffer.
3392 * The iterator comes from a call to ring_buffer_read_prepare and
3393 * an intervening ring_buffer_read_prepare_sync must have been
3394 * performed.
3395 *
3396 * Must be paired with ring_buffer_finish.
3397 */
3398void
3399ring_buffer_read_start(struct ring_buffer_iter *iter)
3400{
3401 struct ring_buffer_per_cpu *cpu_buffer;
3402 unsigned long flags;
3403
3404 if (!iter)
3405 return;
3406
3407 cpu_buffer = iter->cpu_buffer;
3310 3408
3311 spin_lock_irqsave(&cpu_buffer->reader_lock, flags); 3409 spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
3312 arch_spin_lock(&cpu_buffer->lock); 3410 arch_spin_lock(&cpu_buffer->lock);
3313 rb_iter_reset(iter); 3411 rb_iter_reset(iter);
3314 arch_spin_unlock(&cpu_buffer->lock); 3412 arch_spin_unlock(&cpu_buffer->lock);
3315 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); 3413 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
3316
3317 return iter;
3318} 3414}
3319EXPORT_SYMBOL_GPL(ring_buffer_read_start); 3415EXPORT_SYMBOL_GPL(ring_buffer_read_start);
3320 3416
@@ -3408,6 +3504,9 @@ rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer)
3408 cpu_buffer->write_stamp = 0; 3504 cpu_buffer->write_stamp = 0;
3409 cpu_buffer->read_stamp = 0; 3505 cpu_buffer->read_stamp = 0;
3410 3506
3507 cpu_buffer->lost_events = 0;
3508 cpu_buffer->last_overrun = 0;
3509
3411 rb_head_page_activate(cpu_buffer); 3510 rb_head_page_activate(cpu_buffer);
3412} 3511}
3413 3512
@@ -3683,6 +3782,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3683 struct ring_buffer_event *event; 3782 struct ring_buffer_event *event;
3684 struct buffer_data_page *bpage; 3783 struct buffer_data_page *bpage;
3685 struct buffer_page *reader; 3784 struct buffer_page *reader;
3785 unsigned long missed_events;
3686 unsigned long flags; 3786 unsigned long flags;
3687 unsigned int commit; 3787 unsigned int commit;
3688 unsigned int read; 3788 unsigned int read;
@@ -3719,6 +3819,9 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3719 read = reader->read; 3819 read = reader->read;
3720 commit = rb_page_commit(reader); 3820 commit = rb_page_commit(reader);
3721 3821
3822 /* Check if any events were dropped */
3823 missed_events = cpu_buffer->lost_events;
3824
3722 /* 3825 /*
3723 * If this page has been partially read or 3826 * If this page has been partially read or
3724 * if len is not big enough to read the rest of the page or 3827 * if len is not big enough to read the rest of the page or
@@ -3779,9 +3882,35 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3779 local_set(&reader->entries, 0); 3882 local_set(&reader->entries, 0);
3780 reader->read = 0; 3883 reader->read = 0;
3781 *data_page = bpage; 3884 *data_page = bpage;
3885
3886 /*
3887 * Use the real_end for the data size,
3888 * This gives us a chance to store the lost events
3889 * on the page.
3890 */
3891 if (reader->real_end)
3892 local_set(&bpage->commit, reader->real_end);
3782 } 3893 }
3783 ret = read; 3894 ret = read;
3784 3895
3896 cpu_buffer->lost_events = 0;
3897 /*
3898 * Set a flag in the commit field if we lost events
3899 */
3900 if (missed_events) {
3901 commit = local_read(&bpage->commit);
3902
3903 /* If there is room at the end of the page to save the
3904 * missed events, then record it there.
3905 */
3906 if (BUF_PAGE_SIZE - commit >= sizeof(missed_events)) {
3907 memcpy(&bpage->data[commit], &missed_events,
3908 sizeof(missed_events));
3909 local_add(RB_MISSED_STORED, &bpage->commit);
3910 }
3911 local_add(RB_MISSED_EVENTS, &bpage->commit);
3912 }
3913
3785 out_unlock: 3914 out_unlock:
3786 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); 3915 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
3787 3916
diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index df74c7982255..302f8a614635 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -81,7 +81,7 @@ static enum event_status read_event(int cpu)
81 int *entry; 81 int *entry;
82 u64 ts; 82 u64 ts;
83 83
84 event = ring_buffer_consume(buffer, cpu, &ts); 84 event = ring_buffer_consume(buffer, cpu, &ts, NULL);
85 if (!event) 85 if (!event)
86 return EVENT_DROPPED; 86 return EVENT_DROPPED;
87 87
@@ -113,7 +113,8 @@ static enum event_status read_page(int cpu)
113 ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1); 113 ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1);
114 if (ret >= 0) { 114 if (ret >= 0) {
115 rpage = bpage; 115 rpage = bpage;
116 commit = local_read(&rpage->commit); 116 /* The commit may have missed event flags set, clear them */
117 commit = local_read(&rpage->commit) & 0xfffff;
117 for (i = 0; i < commit && !kill_test; i += inc) { 118 for (i = 0; i < commit && !kill_test; i += inc) {
118 119
119 if (i >= (PAGE_SIZE - offsetof(struct rb_page, data))) { 120 if (i >= (PAGE_SIZE - offsetof(struct rb_page, data))) {
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 44f916a04065..756d7283318b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -117,9 +117,12 @@ static cpumask_var_t __read_mostly tracing_buffer_mask;
117 * 117 *
118 * It is default off, but you can enable it with either specifying 118 * It is default off, but you can enable it with either specifying
119 * "ftrace_dump_on_oops" in the kernel command line, or setting 119 * "ftrace_dump_on_oops" in the kernel command line, or setting
120 * /proc/sys/kernel/ftrace_dump_on_oops to true. 120 * /proc/sys/kernel/ftrace_dump_on_oops
121 * Set 1 if you want to dump buffers of all CPUs
122 * Set 2 if you want to dump the buffer of the CPU that triggered oops
121 */ 123 */
122int ftrace_dump_on_oops; 124
125enum ftrace_dump_mode ftrace_dump_on_oops;
123 126
124static int tracing_set_tracer(const char *buf); 127static int tracing_set_tracer(const char *buf);
125 128
@@ -139,8 +142,17 @@ __setup("ftrace=", set_cmdline_ftrace);
139 142
140static int __init set_ftrace_dump_on_oops(char *str) 143static int __init set_ftrace_dump_on_oops(char *str)
141{ 144{
142 ftrace_dump_on_oops = 1; 145 if (*str++ != '=' || !*str) {
143 return 1; 146 ftrace_dump_on_oops = DUMP_ALL;
147 return 1;
148 }
149
150 if (!strcmp("orig_cpu", str)) {
151 ftrace_dump_on_oops = DUMP_ORIG;
152 return 1;
153 }
154
155 return 0;
144} 156}
145__setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops); 157__setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops);
146 158
@@ -1545,7 +1557,8 @@ static void trace_iterator_increment(struct trace_iterator *iter)
1545} 1557}
1546 1558
1547static struct trace_entry * 1559static struct trace_entry *
1548peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts) 1560peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts,
1561 unsigned long *lost_events)
1549{ 1562{
1550 struct ring_buffer_event *event; 1563 struct ring_buffer_event *event;
1551 struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu]; 1564 struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu];
@@ -1556,7 +1569,8 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts)
1556 if (buf_iter) 1569 if (buf_iter)
1557 event = ring_buffer_iter_peek(buf_iter, ts); 1570 event = ring_buffer_iter_peek(buf_iter, ts);
1558 else 1571 else
1559 event = ring_buffer_peek(iter->tr->buffer, cpu, ts); 1572 event = ring_buffer_peek(iter->tr->buffer, cpu, ts,
1573 lost_events);
1560 1574
1561 ftrace_enable_cpu(); 1575 ftrace_enable_cpu();
1562 1576
@@ -1564,10 +1578,12 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts)
1564} 1578}
1565 1579
1566static struct trace_entry * 1580static struct trace_entry *
1567__find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) 1581__find_next_entry(struct trace_iterator *iter, int *ent_cpu,
1582 unsigned long *missing_events, u64 *ent_ts)
1568{ 1583{
1569 struct ring_buffer *buffer = iter->tr->buffer; 1584 struct ring_buffer *buffer = iter->tr->buffer;
1570 struct trace_entry *ent, *next = NULL; 1585 struct trace_entry *ent, *next = NULL;
1586 unsigned long lost_events = 0, next_lost = 0;
1571 int cpu_file = iter->cpu_file; 1587 int cpu_file = iter->cpu_file;
1572 u64 next_ts = 0, ts; 1588 u64 next_ts = 0, ts;
1573 int next_cpu = -1; 1589 int next_cpu = -1;
@@ -1580,7 +1596,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1580 if (cpu_file > TRACE_PIPE_ALL_CPU) { 1596 if (cpu_file > TRACE_PIPE_ALL_CPU) {
1581 if (ring_buffer_empty_cpu(buffer, cpu_file)) 1597 if (ring_buffer_empty_cpu(buffer, cpu_file))
1582 return NULL; 1598 return NULL;
1583 ent = peek_next_entry(iter, cpu_file, ent_ts); 1599 ent = peek_next_entry(iter, cpu_file, ent_ts, missing_events);
1584 if (ent_cpu) 1600 if (ent_cpu)
1585 *ent_cpu = cpu_file; 1601 *ent_cpu = cpu_file;
1586 1602
@@ -1592,7 +1608,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1592 if (ring_buffer_empty_cpu(buffer, cpu)) 1608 if (ring_buffer_empty_cpu(buffer, cpu))
1593 continue; 1609 continue;
1594 1610
1595 ent = peek_next_entry(iter, cpu, &ts); 1611 ent = peek_next_entry(iter, cpu, &ts, &lost_events);
1596 1612
1597 /* 1613 /*
1598 * Pick the entry with the smallest timestamp: 1614 * Pick the entry with the smallest timestamp:
@@ -1601,6 +1617,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1601 next = ent; 1617 next = ent;
1602 next_cpu = cpu; 1618 next_cpu = cpu;
1603 next_ts = ts; 1619 next_ts = ts;
1620 next_lost = lost_events;
1604 } 1621 }
1605 } 1622 }
1606 1623
@@ -1610,6 +1627,9 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1610 if (ent_ts) 1627 if (ent_ts)
1611 *ent_ts = next_ts; 1628 *ent_ts = next_ts;
1612 1629
1630 if (missing_events)
1631 *missing_events = next_lost;
1632
1613 return next; 1633 return next;
1614} 1634}
1615 1635
@@ -1617,13 +1637,14 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1617struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, 1637struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
1618 int *ent_cpu, u64 *ent_ts) 1638 int *ent_cpu, u64 *ent_ts)
1619{ 1639{
1620 return __find_next_entry(iter, ent_cpu, ent_ts); 1640 return __find_next_entry(iter, ent_cpu, NULL, ent_ts);
1621} 1641}
1622 1642
1623/* Find the next real entry, and increment the iterator to the next entry */ 1643/* Find the next real entry, and increment the iterator to the next entry */
1624static void *find_next_entry_inc(struct trace_iterator *iter) 1644static void *find_next_entry_inc(struct trace_iterator *iter)
1625{ 1645{
1626 iter->ent = __find_next_entry(iter, &iter->cpu, &iter->ts); 1646 iter->ent = __find_next_entry(iter, &iter->cpu,
1647 &iter->lost_events, &iter->ts);
1627 1648
1628 if (iter->ent) 1649 if (iter->ent)
1629 trace_iterator_increment(iter); 1650 trace_iterator_increment(iter);
@@ -1635,7 +1656,8 @@ static void trace_consume(struct trace_iterator *iter)
1635{ 1656{
1636 /* Don't allow ftrace to trace into the ring buffers */ 1657 /* Don't allow ftrace to trace into the ring buffers */
1637 ftrace_disable_cpu(); 1658 ftrace_disable_cpu();
1638 ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts); 1659 ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts,
1660 &iter->lost_events);
1639 ftrace_enable_cpu(); 1661 ftrace_enable_cpu();
1640} 1662}
1641 1663
@@ -1786,7 +1808,7 @@ static void print_func_help_header(struct seq_file *m)
1786} 1808}
1787 1809
1788 1810
1789static void 1811void
1790print_trace_header(struct seq_file *m, struct trace_iterator *iter) 1812print_trace_header(struct seq_file *m, struct trace_iterator *iter)
1791{ 1813{
1792 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); 1814 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
@@ -1995,7 +2017,7 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
1995 return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED; 2017 return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED;
1996} 2018}
1997 2019
1998static int trace_empty(struct trace_iterator *iter) 2020int trace_empty(struct trace_iterator *iter)
1999{ 2021{
2000 int cpu; 2022 int cpu;
2001 2023
@@ -2030,6 +2052,10 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
2030{ 2052{
2031 enum print_line_t ret; 2053 enum print_line_t ret;
2032 2054
2055 if (iter->lost_events)
2056 trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n",
2057 iter->cpu, iter->lost_events);
2058
2033 if (iter->trace && iter->trace->print_line) { 2059 if (iter->trace && iter->trace->print_line) {
2034 ret = iter->trace->print_line(iter); 2060 ret = iter->trace->print_line(iter);
2035 if (ret != TRACE_TYPE_UNHANDLED) 2061 if (ret != TRACE_TYPE_UNHANDLED)
@@ -2058,6 +2084,23 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
2058 return print_trace_fmt(iter); 2084 return print_trace_fmt(iter);
2059} 2085}
2060 2086
2087void trace_default_header(struct seq_file *m)
2088{
2089 struct trace_iterator *iter = m->private;
2090
2091 if (iter->iter_flags & TRACE_FILE_LAT_FMT) {
2092 /* print nothing if the buffers are empty */
2093 if (trace_empty(iter))
2094 return;
2095 print_trace_header(m, iter);
2096 if (!(trace_flags & TRACE_ITER_VERBOSE))
2097 print_lat_help_header(m);
2098 } else {
2099 if (!(trace_flags & TRACE_ITER_VERBOSE))
2100 print_func_help_header(m);
2101 }
2102}
2103
2061static int s_show(struct seq_file *m, void *v) 2104static int s_show(struct seq_file *m, void *v)
2062{ 2105{
2063 struct trace_iterator *iter = v; 2106 struct trace_iterator *iter = v;
@@ -2070,17 +2113,9 @@ static int s_show(struct seq_file *m, void *v)
2070 } 2113 }
2071 if (iter->trace && iter->trace->print_header) 2114 if (iter->trace && iter->trace->print_header)
2072 iter->trace->print_header(m); 2115 iter->trace->print_header(m);
2073 else if (iter->iter_flags & TRACE_FILE_LAT_FMT) { 2116 else
2074 /* print nothing if the buffers are empty */ 2117 trace_default_header(m);
2075 if (trace_empty(iter)) 2118
2076 return 0;
2077 print_trace_header(m, iter);
2078 if (!(trace_flags & TRACE_ITER_VERBOSE))
2079 print_lat_help_header(m);
2080 } else {
2081 if (!(trace_flags & TRACE_ITER_VERBOSE))
2082 print_func_help_header(m);
2083 }
2084 } else if (iter->leftover) { 2119 } else if (iter->leftover) {
2085 /* 2120 /*
2086 * If we filled the seq_file buffer earlier, we 2121 * If we filled the seq_file buffer earlier, we
@@ -2166,15 +2201,20 @@ __tracing_open(struct inode *inode, struct file *file)
2166 2201
2167 if (iter->cpu_file == TRACE_PIPE_ALL_CPU) { 2202 if (iter->cpu_file == TRACE_PIPE_ALL_CPU) {
2168 for_each_tracing_cpu(cpu) { 2203 for_each_tracing_cpu(cpu) {
2169
2170 iter->buffer_iter[cpu] = 2204 iter->buffer_iter[cpu] =
2171 ring_buffer_read_start(iter->tr->buffer, cpu); 2205 ring_buffer_read_prepare(iter->tr->buffer, cpu);
2206 }
2207 ring_buffer_read_prepare_sync();
2208 for_each_tracing_cpu(cpu) {
2209 ring_buffer_read_start(iter->buffer_iter[cpu]);
2172 tracing_iter_reset(iter, cpu); 2210 tracing_iter_reset(iter, cpu);
2173 } 2211 }
2174 } else { 2212 } else {
2175 cpu = iter->cpu_file; 2213 cpu = iter->cpu_file;
2176 iter->buffer_iter[cpu] = 2214 iter->buffer_iter[cpu] =
2177 ring_buffer_read_start(iter->tr->buffer, cpu); 2215 ring_buffer_read_prepare(iter->tr->buffer, cpu);
2216 ring_buffer_read_prepare_sync();
2217 ring_buffer_read_start(iter->buffer_iter[cpu]);
2178 tracing_iter_reset(iter, cpu); 2218 tracing_iter_reset(iter, cpu);
2179 } 2219 }
2180 2220
@@ -4324,7 +4364,7 @@ static int trace_panic_handler(struct notifier_block *this,
4324 unsigned long event, void *unused) 4364 unsigned long event, void *unused)
4325{ 4365{
4326 if (ftrace_dump_on_oops) 4366 if (ftrace_dump_on_oops)
4327 ftrace_dump(); 4367 ftrace_dump(ftrace_dump_on_oops);
4328 return NOTIFY_OK; 4368 return NOTIFY_OK;
4329} 4369}
4330 4370
@@ -4341,7 +4381,7 @@ static int trace_die_handler(struct notifier_block *self,
4341 switch (val) { 4381 switch (val) {
4342 case DIE_OOPS: 4382 case DIE_OOPS:
4343 if (ftrace_dump_on_oops) 4383 if (ftrace_dump_on_oops)
4344 ftrace_dump(); 4384 ftrace_dump(ftrace_dump_on_oops);
4345 break; 4385 break;
4346 default: 4386 default:
4347 break; 4387 break;
@@ -4382,7 +4422,8 @@ trace_printk_seq(struct trace_seq *s)
4382 trace_seq_init(s); 4422 trace_seq_init(s);
4383} 4423}
4384 4424
4385static void __ftrace_dump(bool disable_tracing) 4425static void
4426__ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
4386{ 4427{
4387 static arch_spinlock_t ftrace_dump_lock = 4428 static arch_spinlock_t ftrace_dump_lock =
4388 (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; 4429 (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
@@ -4415,12 +4456,25 @@ static void __ftrace_dump(bool disable_tracing)
4415 /* don't look at user memory in panic mode */ 4456 /* don't look at user memory in panic mode */
4416 trace_flags &= ~TRACE_ITER_SYM_USEROBJ; 4457 trace_flags &= ~TRACE_ITER_SYM_USEROBJ;
4417 4458
4418 printk(KERN_TRACE "Dumping ftrace buffer:\n");
4419
4420 /* Simulate the iterator */ 4459 /* Simulate the iterator */
4421 iter.tr = &global_trace; 4460 iter.tr = &global_trace;
4422 iter.trace = current_trace; 4461 iter.trace = current_trace;
4423 iter.cpu_file = TRACE_PIPE_ALL_CPU; 4462
4463 switch (oops_dump_mode) {
4464 case DUMP_ALL:
4465 iter.cpu_file = TRACE_PIPE_ALL_CPU;
4466 break;
4467 case DUMP_ORIG:
4468 iter.cpu_file = raw_smp_processor_id();
4469 break;
4470 case DUMP_NONE:
4471 goto out_enable;
4472 default:
4473 printk(KERN_TRACE "Bad dumping mode, switching to all CPUs dump\n");
4474 iter.cpu_file = TRACE_PIPE_ALL_CPU;
4475 }
4476
4477 printk(KERN_TRACE "Dumping ftrace buffer:\n");
4424 4478
4425 /* 4479 /*
4426 * We need to stop all tracing on all CPUS to read the 4480 * We need to stop all tracing on all CPUS to read the
@@ -4459,6 +4513,7 @@ static void __ftrace_dump(bool disable_tracing)
4459 else 4513 else
4460 printk(KERN_TRACE "---------------------------------\n"); 4514 printk(KERN_TRACE "---------------------------------\n");
4461 4515
4516 out_enable:
4462 /* Re-enable tracing if requested */ 4517 /* Re-enable tracing if requested */
4463 if (!disable_tracing) { 4518 if (!disable_tracing) {
4464 trace_flags |= old_userobj; 4519 trace_flags |= old_userobj;
@@ -4475,9 +4530,9 @@ static void __ftrace_dump(bool disable_tracing)
4475} 4530}
4476 4531
4477/* By default: disable tracing after the dump */ 4532/* By default: disable tracing after the dump */
4478void ftrace_dump(void) 4533void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
4479{ 4534{
4480 __ftrace_dump(true); 4535 __ftrace_dump(true, oops_dump_mode);
4481} 4536}
4482 4537
4483__init static int tracer_alloc_buffers(void) 4538__init static int tracer_alloc_buffers(void)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 3ebdb6bd2362..d1ce0bec1b3f 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -364,6 +364,9 @@ void trace_function(struct trace_array *tr,
364 unsigned long ip, 364 unsigned long ip,
365 unsigned long parent_ip, 365 unsigned long parent_ip,
366 unsigned long flags, int pc); 366 unsigned long flags, int pc);
367void trace_default_header(struct seq_file *m);
368void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
369int trace_empty(struct trace_iterator *iter);
367 370
368void trace_graph_return(struct ftrace_graph_ret *trace); 371void trace_graph_return(struct ftrace_graph_ret *trace);
369int trace_graph_entry(struct ftrace_graph_ent *trace); 372int trace_graph_entry(struct ftrace_graph_ent *trace);
@@ -475,9 +478,29 @@ extern int trace_clock_id;
475 478
476/* Standard output formatting function used for function return traces */ 479/* Standard output formatting function used for function return traces */
477#ifdef CONFIG_FUNCTION_GRAPH_TRACER 480#ifdef CONFIG_FUNCTION_GRAPH_TRACER
478extern enum print_line_t print_graph_function(struct trace_iterator *iter); 481
482/* Flag options */
483#define TRACE_GRAPH_PRINT_OVERRUN 0x1
484#define TRACE_GRAPH_PRINT_CPU 0x2
485#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
486#define TRACE_GRAPH_PRINT_PROC 0x8
487#define TRACE_GRAPH_PRINT_DURATION 0x10
488#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
489
490extern enum print_line_t
491print_graph_function_flags(struct trace_iterator *iter, u32 flags);
492extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
479extern enum print_line_t 493extern enum print_line_t
480trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); 494trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
495extern void graph_trace_open(struct trace_iterator *iter);
496extern void graph_trace_close(struct trace_iterator *iter);
497extern int __trace_graph_entry(struct trace_array *tr,
498 struct ftrace_graph_ent *trace,
499 unsigned long flags, int pc);
500extern void __trace_graph_return(struct trace_array *tr,
501 struct ftrace_graph_ret *trace,
502 unsigned long flags, int pc);
503
481 504
482#ifdef CONFIG_DYNAMIC_FTRACE 505#ifdef CONFIG_DYNAMIC_FTRACE
483/* TODO: make this variable */ 506/* TODO: make this variable */
@@ -508,7 +531,7 @@ static inline int ftrace_graph_addr(unsigned long addr)
508#endif /* CONFIG_DYNAMIC_FTRACE */ 531#endif /* CONFIG_DYNAMIC_FTRACE */
509#else /* CONFIG_FUNCTION_GRAPH_TRACER */ 532#else /* CONFIG_FUNCTION_GRAPH_TRACER */
510static inline enum print_line_t 533static inline enum print_line_t
511print_graph_function(struct trace_iterator *iter) 534print_graph_function_flags(struct trace_iterator *iter, u32 flags)
512{ 535{
513 return TRACE_TYPE_UNHANDLED; 536 return TRACE_TYPE_UNHANDLED;
514} 537}
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 9aed1a5cf553..dd11c830eb84 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -40,7 +40,7 @@ struct fgraph_data {
40#define TRACE_GRAPH_PRINT_OVERHEAD 0x4 40#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
41#define TRACE_GRAPH_PRINT_PROC 0x8 41#define TRACE_GRAPH_PRINT_PROC 0x8
42#define TRACE_GRAPH_PRINT_DURATION 0x10 42#define TRACE_GRAPH_PRINT_DURATION 0x10
43#define TRACE_GRAPH_PRINT_ABS_TIME 0X20 43#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
44 44
45static struct tracer_opt trace_opts[] = { 45static struct tracer_opt trace_opts[] = {
46 /* Display overruns? (for self-debug purpose) */ 46 /* Display overruns? (for self-debug purpose) */
@@ -179,7 +179,7 @@ unsigned long ftrace_return_to_handler(unsigned long frame_pointer)
179 return ret; 179 return ret;
180} 180}
181 181
182static int __trace_graph_entry(struct trace_array *tr, 182int __trace_graph_entry(struct trace_array *tr,
183 struct ftrace_graph_ent *trace, 183 struct ftrace_graph_ent *trace,
184 unsigned long flags, 184 unsigned long flags,
185 int pc) 185 int pc)
@@ -246,7 +246,7 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace)
246 return trace_graph_entry(trace); 246 return trace_graph_entry(trace);
247} 247}
248 248
249static void __trace_graph_return(struct trace_array *tr, 249void __trace_graph_return(struct trace_array *tr,
250 struct ftrace_graph_ret *trace, 250 struct ftrace_graph_ret *trace,
251 unsigned long flags, 251 unsigned long flags,
252 int pc) 252 int pc)
@@ -490,9 +490,10 @@ get_return_for_leaf(struct trace_iterator *iter,
490 * We need to consume the current entry to see 490 * We need to consume the current entry to see
491 * the next one. 491 * the next one.
492 */ 492 */
493 ring_buffer_consume(iter->tr->buffer, iter->cpu, NULL); 493 ring_buffer_consume(iter->tr->buffer, iter->cpu,
494 NULL, NULL);
494 event = ring_buffer_peek(iter->tr->buffer, iter->cpu, 495 event = ring_buffer_peek(iter->tr->buffer, iter->cpu,
495 NULL); 496 NULL, NULL);
496 } 497 }
497 498
498 if (!event) 499 if (!event)
@@ -526,17 +527,18 @@ get_return_for_leaf(struct trace_iterator *iter,
526 527
527/* Signal a overhead of time execution to the output */ 528/* Signal a overhead of time execution to the output */
528static int 529static int
529print_graph_overhead(unsigned long long duration, struct trace_seq *s) 530print_graph_overhead(unsigned long long duration, struct trace_seq *s,
531 u32 flags)
530{ 532{
531 /* If duration disappear, we don't need anything */ 533 /* If duration disappear, we don't need anything */
532 if (!(tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)) 534 if (!(flags & TRACE_GRAPH_PRINT_DURATION))
533 return 1; 535 return 1;
534 536
535 /* Non nested entry or return */ 537 /* Non nested entry or return */
536 if (duration == -1) 538 if (duration == -1)
537 return trace_seq_printf(s, " "); 539 return trace_seq_printf(s, " ");
538 540
539 if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERHEAD) { 541 if (flags & TRACE_GRAPH_PRINT_OVERHEAD) {
540 /* Duration exceeded 100 msecs */ 542 /* Duration exceeded 100 msecs */
541 if (duration > 100000ULL) 543 if (duration > 100000ULL)
542 return trace_seq_printf(s, "! "); 544 return trace_seq_printf(s, "! ");
@@ -562,7 +564,7 @@ static int print_graph_abs_time(u64 t, struct trace_seq *s)
562 564
563static enum print_line_t 565static enum print_line_t
564print_graph_irq(struct trace_iterator *iter, unsigned long addr, 566print_graph_irq(struct trace_iterator *iter, unsigned long addr,
565 enum trace_type type, int cpu, pid_t pid) 567 enum trace_type type, int cpu, pid_t pid, u32 flags)
566{ 568{
567 int ret; 569 int ret;
568 struct trace_seq *s = &iter->seq; 570 struct trace_seq *s = &iter->seq;
@@ -572,21 +574,21 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
572 return TRACE_TYPE_UNHANDLED; 574 return TRACE_TYPE_UNHANDLED;
573 575
574 /* Absolute time */ 576 /* Absolute time */
575 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { 577 if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
576 ret = print_graph_abs_time(iter->ts, s); 578 ret = print_graph_abs_time(iter->ts, s);
577 if (!ret) 579 if (!ret)
578 return TRACE_TYPE_PARTIAL_LINE; 580 return TRACE_TYPE_PARTIAL_LINE;
579 } 581 }
580 582
581 /* Cpu */ 583 /* Cpu */
582 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { 584 if (flags & TRACE_GRAPH_PRINT_CPU) {
583 ret = print_graph_cpu(s, cpu); 585 ret = print_graph_cpu(s, cpu);
584 if (ret == TRACE_TYPE_PARTIAL_LINE) 586 if (ret == TRACE_TYPE_PARTIAL_LINE)
585 return TRACE_TYPE_PARTIAL_LINE; 587 return TRACE_TYPE_PARTIAL_LINE;
586 } 588 }
587 589
588 /* Proc */ 590 /* Proc */
589 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { 591 if (flags & TRACE_GRAPH_PRINT_PROC) {
590 ret = print_graph_proc(s, pid); 592 ret = print_graph_proc(s, pid);
591 if (ret == TRACE_TYPE_PARTIAL_LINE) 593 if (ret == TRACE_TYPE_PARTIAL_LINE)
592 return TRACE_TYPE_PARTIAL_LINE; 594 return TRACE_TYPE_PARTIAL_LINE;
@@ -596,7 +598,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
596 } 598 }
597 599
598 /* No overhead */ 600 /* No overhead */
599 ret = print_graph_overhead(-1, s); 601 ret = print_graph_overhead(-1, s, flags);
600 if (!ret) 602 if (!ret)
601 return TRACE_TYPE_PARTIAL_LINE; 603 return TRACE_TYPE_PARTIAL_LINE;
602 604
@@ -609,7 +611,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
609 return TRACE_TYPE_PARTIAL_LINE; 611 return TRACE_TYPE_PARTIAL_LINE;
610 612
611 /* Don't close the duration column if haven't one */ 613 /* Don't close the duration column if haven't one */
612 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 614 if (flags & TRACE_GRAPH_PRINT_DURATION)
613 trace_seq_printf(s, " |"); 615 trace_seq_printf(s, " |");
614 ret = trace_seq_printf(s, "\n"); 616 ret = trace_seq_printf(s, "\n");
615 617
@@ -679,7 +681,8 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s)
679static enum print_line_t 681static enum print_line_t
680print_graph_entry_leaf(struct trace_iterator *iter, 682print_graph_entry_leaf(struct trace_iterator *iter,
681 struct ftrace_graph_ent_entry *entry, 683 struct ftrace_graph_ent_entry *entry,
682 struct ftrace_graph_ret_entry *ret_entry, struct trace_seq *s) 684 struct ftrace_graph_ret_entry *ret_entry,
685 struct trace_seq *s, u32 flags)
683{ 686{
684 struct fgraph_data *data = iter->private; 687 struct fgraph_data *data = iter->private;
685 struct ftrace_graph_ret *graph_ret; 688 struct ftrace_graph_ret *graph_ret;
@@ -711,12 +714,12 @@ print_graph_entry_leaf(struct trace_iterator *iter,
711 } 714 }
712 715
713 /* Overhead */ 716 /* Overhead */
714 ret = print_graph_overhead(duration, s); 717 ret = print_graph_overhead(duration, s, flags);
715 if (!ret) 718 if (!ret)
716 return TRACE_TYPE_PARTIAL_LINE; 719 return TRACE_TYPE_PARTIAL_LINE;
717 720
718 /* Duration */ 721 /* Duration */
719 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 722 if (flags & TRACE_GRAPH_PRINT_DURATION) {
720 ret = print_graph_duration(duration, s); 723 ret = print_graph_duration(duration, s);
721 if (ret == TRACE_TYPE_PARTIAL_LINE) 724 if (ret == TRACE_TYPE_PARTIAL_LINE)
722 return TRACE_TYPE_PARTIAL_LINE; 725 return TRACE_TYPE_PARTIAL_LINE;
@@ -739,7 +742,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
739static enum print_line_t 742static enum print_line_t
740print_graph_entry_nested(struct trace_iterator *iter, 743print_graph_entry_nested(struct trace_iterator *iter,
741 struct ftrace_graph_ent_entry *entry, 744 struct ftrace_graph_ent_entry *entry,
742 struct trace_seq *s, int cpu) 745 struct trace_seq *s, int cpu, u32 flags)
743{ 746{
744 struct ftrace_graph_ent *call = &entry->graph_ent; 747 struct ftrace_graph_ent *call = &entry->graph_ent;
745 struct fgraph_data *data = iter->private; 748 struct fgraph_data *data = iter->private;
@@ -759,12 +762,12 @@ print_graph_entry_nested(struct trace_iterator *iter,
759 } 762 }
760 763
761 /* No overhead */ 764 /* No overhead */
762 ret = print_graph_overhead(-1, s); 765 ret = print_graph_overhead(-1, s, flags);
763 if (!ret) 766 if (!ret)
764 return TRACE_TYPE_PARTIAL_LINE; 767 return TRACE_TYPE_PARTIAL_LINE;
765 768
766 /* No time */ 769 /* No time */
767 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 770 if (flags & TRACE_GRAPH_PRINT_DURATION) {
768 ret = trace_seq_printf(s, " | "); 771 ret = trace_seq_printf(s, " | ");
769 if (!ret) 772 if (!ret)
770 return TRACE_TYPE_PARTIAL_LINE; 773 return TRACE_TYPE_PARTIAL_LINE;
@@ -790,7 +793,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
790 793
791static enum print_line_t 794static enum print_line_t
792print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, 795print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
793 int type, unsigned long addr) 796 int type, unsigned long addr, u32 flags)
794{ 797{
795 struct fgraph_data *data = iter->private; 798 struct fgraph_data *data = iter->private;
796 struct trace_entry *ent = iter->ent; 799 struct trace_entry *ent = iter->ent;
@@ -803,27 +806,27 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
803 806
804 if (type) { 807 if (type) {
805 /* Interrupt */ 808 /* Interrupt */
806 ret = print_graph_irq(iter, addr, type, cpu, ent->pid); 809 ret = print_graph_irq(iter, addr, type, cpu, ent->pid, flags);
807 if (ret == TRACE_TYPE_PARTIAL_LINE) 810 if (ret == TRACE_TYPE_PARTIAL_LINE)
808 return TRACE_TYPE_PARTIAL_LINE; 811 return TRACE_TYPE_PARTIAL_LINE;
809 } 812 }
810 813
811 /* Absolute time */ 814 /* Absolute time */
812 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { 815 if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
813 ret = print_graph_abs_time(iter->ts, s); 816 ret = print_graph_abs_time(iter->ts, s);
814 if (!ret) 817 if (!ret)
815 return TRACE_TYPE_PARTIAL_LINE; 818 return TRACE_TYPE_PARTIAL_LINE;
816 } 819 }
817 820
818 /* Cpu */ 821 /* Cpu */
819 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { 822 if (flags & TRACE_GRAPH_PRINT_CPU) {
820 ret = print_graph_cpu(s, cpu); 823 ret = print_graph_cpu(s, cpu);
821 if (ret == TRACE_TYPE_PARTIAL_LINE) 824 if (ret == TRACE_TYPE_PARTIAL_LINE)
822 return TRACE_TYPE_PARTIAL_LINE; 825 return TRACE_TYPE_PARTIAL_LINE;
823 } 826 }
824 827
825 /* Proc */ 828 /* Proc */
826 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { 829 if (flags & TRACE_GRAPH_PRINT_PROC) {
827 ret = print_graph_proc(s, ent->pid); 830 ret = print_graph_proc(s, ent->pid);
828 if (ret == TRACE_TYPE_PARTIAL_LINE) 831 if (ret == TRACE_TYPE_PARTIAL_LINE)
829 return TRACE_TYPE_PARTIAL_LINE; 832 return TRACE_TYPE_PARTIAL_LINE;
@@ -845,7 +848,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
845 848
846static enum print_line_t 849static enum print_line_t
847print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s, 850print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
848 struct trace_iterator *iter) 851 struct trace_iterator *iter, u32 flags)
849{ 852{
850 struct fgraph_data *data = iter->private; 853 struct fgraph_data *data = iter->private;
851 struct ftrace_graph_ent *call = &field->graph_ent; 854 struct ftrace_graph_ent *call = &field->graph_ent;
@@ -853,14 +856,14 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
853 static enum print_line_t ret; 856 static enum print_line_t ret;
854 int cpu = iter->cpu; 857 int cpu = iter->cpu;
855 858
856 if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func)) 859 if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags))
857 return TRACE_TYPE_PARTIAL_LINE; 860 return TRACE_TYPE_PARTIAL_LINE;
858 861
859 leaf_ret = get_return_for_leaf(iter, field); 862 leaf_ret = get_return_for_leaf(iter, field);
860 if (leaf_ret) 863 if (leaf_ret)
861 ret = print_graph_entry_leaf(iter, field, leaf_ret, s); 864 ret = print_graph_entry_leaf(iter, field, leaf_ret, s, flags);
862 else 865 else
863 ret = print_graph_entry_nested(iter, field, s, cpu); 866 ret = print_graph_entry_nested(iter, field, s, cpu, flags);
864 867
865 if (data) { 868 if (data) {
866 /* 869 /*
@@ -879,7 +882,8 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
879 882
880static enum print_line_t 883static enum print_line_t
881print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, 884print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
882 struct trace_entry *ent, struct trace_iterator *iter) 885 struct trace_entry *ent, struct trace_iterator *iter,
886 u32 flags)
883{ 887{
884 unsigned long long duration = trace->rettime - trace->calltime; 888 unsigned long long duration = trace->rettime - trace->calltime;
885 struct fgraph_data *data = iter->private; 889 struct fgraph_data *data = iter->private;
@@ -909,16 +913,16 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
909 } 913 }
910 } 914 }
911 915
912 if (print_graph_prologue(iter, s, 0, 0)) 916 if (print_graph_prologue(iter, s, 0, 0, flags))
913 return TRACE_TYPE_PARTIAL_LINE; 917 return TRACE_TYPE_PARTIAL_LINE;
914 918
915 /* Overhead */ 919 /* Overhead */
916 ret = print_graph_overhead(duration, s); 920 ret = print_graph_overhead(duration, s, flags);
917 if (!ret) 921 if (!ret)
918 return TRACE_TYPE_PARTIAL_LINE; 922 return TRACE_TYPE_PARTIAL_LINE;
919 923
920 /* Duration */ 924 /* Duration */
921 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 925 if (flags & TRACE_GRAPH_PRINT_DURATION) {
922 ret = print_graph_duration(duration, s); 926 ret = print_graph_duration(duration, s);
923 if (ret == TRACE_TYPE_PARTIAL_LINE) 927 if (ret == TRACE_TYPE_PARTIAL_LINE)
924 return TRACE_TYPE_PARTIAL_LINE; 928 return TRACE_TYPE_PARTIAL_LINE;
@@ -948,14 +952,15 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
948 } 952 }
949 953
950 /* Overrun */ 954 /* Overrun */
951 if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERRUN) { 955 if (flags & TRACE_GRAPH_PRINT_OVERRUN) {
952 ret = trace_seq_printf(s, " (Overruns: %lu)\n", 956 ret = trace_seq_printf(s, " (Overruns: %lu)\n",
953 trace->overrun); 957 trace->overrun);
954 if (!ret) 958 if (!ret)
955 return TRACE_TYPE_PARTIAL_LINE; 959 return TRACE_TYPE_PARTIAL_LINE;
956 } 960 }
957 961
958 ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET, cpu, pid); 962 ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET,
963 cpu, pid, flags);
959 if (ret == TRACE_TYPE_PARTIAL_LINE) 964 if (ret == TRACE_TYPE_PARTIAL_LINE)
960 return TRACE_TYPE_PARTIAL_LINE; 965 return TRACE_TYPE_PARTIAL_LINE;
961 966
@@ -963,8 +968,8 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
963} 968}
964 969
965static enum print_line_t 970static enum print_line_t
966print_graph_comment(struct trace_seq *s, struct trace_entry *ent, 971print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
967 struct trace_iterator *iter) 972 struct trace_iterator *iter, u32 flags)
968{ 973{
969 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); 974 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
970 struct fgraph_data *data = iter->private; 975 struct fgraph_data *data = iter->private;
@@ -976,16 +981,16 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
976 if (data) 981 if (data)
977 depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth; 982 depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth;
978 983
979 if (print_graph_prologue(iter, s, 0, 0)) 984 if (print_graph_prologue(iter, s, 0, 0, flags))
980 return TRACE_TYPE_PARTIAL_LINE; 985 return TRACE_TYPE_PARTIAL_LINE;
981 986
982 /* No overhead */ 987 /* No overhead */
983 ret = print_graph_overhead(-1, s); 988 ret = print_graph_overhead(-1, s, flags);
984 if (!ret) 989 if (!ret)
985 return TRACE_TYPE_PARTIAL_LINE; 990 return TRACE_TYPE_PARTIAL_LINE;
986 991
987 /* No time */ 992 /* No time */
988 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 993 if (flags & TRACE_GRAPH_PRINT_DURATION) {
989 ret = trace_seq_printf(s, " | "); 994 ret = trace_seq_printf(s, " | ");
990 if (!ret) 995 if (!ret)
991 return TRACE_TYPE_PARTIAL_LINE; 996 return TRACE_TYPE_PARTIAL_LINE;
@@ -1040,7 +1045,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
1040 1045
1041 1046
1042enum print_line_t 1047enum print_line_t
1043print_graph_function(struct trace_iterator *iter) 1048print_graph_function_flags(struct trace_iterator *iter, u32 flags)
1044{ 1049{
1045 struct ftrace_graph_ent_entry *field; 1050 struct ftrace_graph_ent_entry *field;
1046 struct fgraph_data *data = iter->private; 1051 struct fgraph_data *data = iter->private;
@@ -1061,7 +1066,7 @@ print_graph_function(struct trace_iterator *iter)
1061 if (data && data->failed) { 1066 if (data && data->failed) {
1062 field = &data->ent; 1067 field = &data->ent;
1063 iter->cpu = data->cpu; 1068 iter->cpu = data->cpu;
1064 ret = print_graph_entry(field, s, iter); 1069 ret = print_graph_entry(field, s, iter, flags);
1065 if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) { 1070 if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) {
1066 per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1; 1071 per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1;
1067 ret = TRACE_TYPE_NO_CONSUME; 1072 ret = TRACE_TYPE_NO_CONSUME;
@@ -1081,32 +1086,49 @@ print_graph_function(struct trace_iterator *iter)
1081 struct ftrace_graph_ent_entry saved; 1086 struct ftrace_graph_ent_entry saved;
1082 trace_assign_type(field, entry); 1087 trace_assign_type(field, entry);
1083 saved = *field; 1088 saved = *field;
1084 return print_graph_entry(&saved, s, iter); 1089 return print_graph_entry(&saved, s, iter, flags);
1085 } 1090 }
1086 case TRACE_GRAPH_RET: { 1091 case TRACE_GRAPH_RET: {
1087 struct ftrace_graph_ret_entry *field; 1092 struct ftrace_graph_ret_entry *field;
1088 trace_assign_type(field, entry); 1093 trace_assign_type(field, entry);
1089 return print_graph_return(&field->ret, s, entry, iter); 1094 return print_graph_return(&field->ret, s, entry, iter, flags);
1090 } 1095 }
1096 case TRACE_STACK:
1097 case TRACE_FN:
1098 /* dont trace stack and functions as comments */
1099 return TRACE_TYPE_UNHANDLED;
1100
1091 default: 1101 default:
1092 return print_graph_comment(s, entry, iter); 1102 return print_graph_comment(s, entry, iter, flags);
1093 } 1103 }
1094 1104
1095 return TRACE_TYPE_HANDLED; 1105 return TRACE_TYPE_HANDLED;
1096} 1106}
1097 1107
1098static void print_lat_header(struct seq_file *s) 1108static enum print_line_t
1109print_graph_function(struct trace_iterator *iter)
1110{
1111 return print_graph_function_flags(iter, tracer_flags.val);
1112}
1113
1114static enum print_line_t
1115print_graph_function_event(struct trace_iterator *iter, int flags)
1116{
1117 return print_graph_function(iter);
1118}
1119
1120static void print_lat_header(struct seq_file *s, u32 flags)
1099{ 1121{
1100 static const char spaces[] = " " /* 16 spaces */ 1122 static const char spaces[] = " " /* 16 spaces */
1101 " " /* 4 spaces */ 1123 " " /* 4 spaces */
1102 " "; /* 17 spaces */ 1124 " "; /* 17 spaces */
1103 int size = 0; 1125 int size = 0;
1104 1126
1105 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1127 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1106 size += 16; 1128 size += 16;
1107 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1129 if (flags & TRACE_GRAPH_PRINT_CPU)
1108 size += 4; 1130 size += 4;
1109 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1131 if (flags & TRACE_GRAPH_PRINT_PROC)
1110 size += 17; 1132 size += 17;
1111 1133
1112 seq_printf(s, "#%.*s _-----=> irqs-off \n", size, spaces); 1134 seq_printf(s, "#%.*s _-----=> irqs-off \n", size, spaces);
@@ -1117,43 +1139,48 @@ static void print_lat_header(struct seq_file *s)
1117 seq_printf(s, "#%.*s|||| / \n", size, spaces); 1139 seq_printf(s, "#%.*s|||| / \n", size, spaces);
1118} 1140}
1119 1141
1120static void print_graph_headers(struct seq_file *s) 1142void print_graph_headers_flags(struct seq_file *s, u32 flags)
1121{ 1143{
1122 int lat = trace_flags & TRACE_ITER_LATENCY_FMT; 1144 int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
1123 1145
1124 if (lat) 1146 if (lat)
1125 print_lat_header(s); 1147 print_lat_header(s, flags);
1126 1148
1127 /* 1st line */ 1149 /* 1st line */
1128 seq_printf(s, "#"); 1150 seq_printf(s, "#");
1129 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1151 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1130 seq_printf(s, " TIME "); 1152 seq_printf(s, " TIME ");
1131 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1153 if (flags & TRACE_GRAPH_PRINT_CPU)
1132 seq_printf(s, " CPU"); 1154 seq_printf(s, " CPU");
1133 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1155 if (flags & TRACE_GRAPH_PRINT_PROC)
1134 seq_printf(s, " TASK/PID "); 1156 seq_printf(s, " TASK/PID ");
1135 if (lat) 1157 if (lat)
1136 seq_printf(s, "|||||"); 1158 seq_printf(s, "|||||");
1137 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 1159 if (flags & TRACE_GRAPH_PRINT_DURATION)
1138 seq_printf(s, " DURATION "); 1160 seq_printf(s, " DURATION ");
1139 seq_printf(s, " FUNCTION CALLS\n"); 1161 seq_printf(s, " FUNCTION CALLS\n");
1140 1162
1141 /* 2nd line */ 1163 /* 2nd line */
1142 seq_printf(s, "#"); 1164 seq_printf(s, "#");
1143 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1165 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1144 seq_printf(s, " | "); 1166 seq_printf(s, " | ");
1145 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1167 if (flags & TRACE_GRAPH_PRINT_CPU)
1146 seq_printf(s, " | "); 1168 seq_printf(s, " | ");
1147 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1169 if (flags & TRACE_GRAPH_PRINT_PROC)
1148 seq_printf(s, " | | "); 1170 seq_printf(s, " | | ");
1149 if (lat) 1171 if (lat)
1150 seq_printf(s, "|||||"); 1172 seq_printf(s, "|||||");
1151 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 1173 if (flags & TRACE_GRAPH_PRINT_DURATION)
1152 seq_printf(s, " | | "); 1174 seq_printf(s, " | | ");
1153 seq_printf(s, " | | | |\n"); 1175 seq_printf(s, " | | | |\n");
1154} 1176}
1155 1177
1156static void graph_trace_open(struct trace_iterator *iter) 1178void print_graph_headers(struct seq_file *s)
1179{
1180 print_graph_headers_flags(s, tracer_flags.val);
1181}
1182
1183void graph_trace_open(struct trace_iterator *iter)
1157{ 1184{
1158 /* pid and depth on the last trace processed */ 1185 /* pid and depth on the last trace processed */
1159 struct fgraph_data *data; 1186 struct fgraph_data *data;
@@ -1188,7 +1215,7 @@ static void graph_trace_open(struct trace_iterator *iter)
1188 pr_warning("function graph tracer: not enough memory\n"); 1215 pr_warning("function graph tracer: not enough memory\n");
1189} 1216}
1190 1217
1191static void graph_trace_close(struct trace_iterator *iter) 1218void graph_trace_close(struct trace_iterator *iter)
1192{ 1219{
1193 struct fgraph_data *data = iter->private; 1220 struct fgraph_data *data = iter->private;
1194 1221
@@ -1198,6 +1225,16 @@ static void graph_trace_close(struct trace_iterator *iter)
1198 } 1225 }
1199} 1226}
1200 1227
1228static struct trace_event graph_trace_entry_event = {
1229 .type = TRACE_GRAPH_ENT,
1230 .trace = print_graph_function_event,
1231};
1232
1233static struct trace_event graph_trace_ret_event = {
1234 .type = TRACE_GRAPH_RET,
1235 .trace = print_graph_function_event,
1236};
1237
1201static struct tracer graph_trace __read_mostly = { 1238static struct tracer graph_trace __read_mostly = {
1202 .name = "function_graph", 1239 .name = "function_graph",
1203 .open = graph_trace_open, 1240 .open = graph_trace_open,
@@ -1219,6 +1256,16 @@ static __init int init_graph_trace(void)
1219{ 1256{
1220 max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1); 1257 max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1);
1221 1258
1259 if (!register_ftrace_event(&graph_trace_entry_event)) {
1260 pr_warning("Warning: could not register graph trace events\n");
1261 return 1;
1262 }
1263
1264 if (!register_ftrace_event(&graph_trace_ret_event)) {
1265 pr_warning("Warning: could not register graph trace events\n");
1266 return 1;
1267 }
1268
1222 return register_tracer(&graph_trace); 1269 return register_tracer(&graph_trace);
1223} 1270}
1224 1271
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 2974bc7538c7..6fd486e0cef4 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -34,6 +34,9 @@ static int trace_type __read_mostly;
34 34
35static int save_lat_flag; 35static int save_lat_flag;
36 36
37static void stop_irqsoff_tracer(struct trace_array *tr, int graph);
38static int start_irqsoff_tracer(struct trace_array *tr, int graph);
39
37#ifdef CONFIG_PREEMPT_TRACER 40#ifdef CONFIG_PREEMPT_TRACER
38static inline int 41static inline int
39preempt_trace(void) 42preempt_trace(void)
@@ -55,6 +58,23 @@ irq_trace(void)
55# define irq_trace() (0) 58# define irq_trace() (0)
56#endif 59#endif
57 60
61#define TRACE_DISPLAY_GRAPH 1
62
63static struct tracer_opt trace_opts[] = {
64#ifdef CONFIG_FUNCTION_GRAPH_TRACER
65 /* display latency trace as call graph */
66 { TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) },
67#endif
68 { } /* Empty entry */
69};
70
71static struct tracer_flags tracer_flags = {
72 .val = 0,
73 .opts = trace_opts,
74};
75
76#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH)
77
58/* 78/*
59 * Sequence count - we record it when starting a measurement and 79 * Sequence count - we record it when starting a measurement and
60 * skip the latency if the sequence has changed - some other section 80 * skip the latency if the sequence has changed - some other section
@@ -108,6 +128,202 @@ static struct ftrace_ops trace_ops __read_mostly =
108}; 128};
109#endif /* CONFIG_FUNCTION_TRACER */ 129#endif /* CONFIG_FUNCTION_TRACER */
110 130
131#ifdef CONFIG_FUNCTION_GRAPH_TRACER
132static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
133{
134 int cpu;
135
136 if (!(bit & TRACE_DISPLAY_GRAPH))
137 return -EINVAL;
138
139 if (!(is_graph() ^ set))
140 return 0;
141
142 stop_irqsoff_tracer(irqsoff_trace, !set);
143
144 for_each_possible_cpu(cpu)
145 per_cpu(tracing_cpu, cpu) = 0;
146
147 tracing_max_latency = 0;
148 tracing_reset_online_cpus(irqsoff_trace);
149
150 return start_irqsoff_tracer(irqsoff_trace, set);
151}
152
153static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
154{
155 struct trace_array *tr = irqsoff_trace;
156 struct trace_array_cpu *data;
157 unsigned long flags;
158 long disabled;
159 int ret;
160 int cpu;
161 int pc;
162
163 cpu = raw_smp_processor_id();
164 if (likely(!per_cpu(tracing_cpu, cpu)))
165 return 0;
166
167 local_save_flags(flags);
168 /* slight chance to get a false positive on tracing_cpu */
169 if (!irqs_disabled_flags(flags))
170 return 0;
171
172 data = tr->data[cpu];
173 disabled = atomic_inc_return(&data->disabled);
174
175 if (likely(disabled == 1)) {
176 pc = preempt_count();
177 ret = __trace_graph_entry(tr, trace, flags, pc);
178 } else
179 ret = 0;
180
181 atomic_dec(&data->disabled);
182 return ret;
183}
184
185static void irqsoff_graph_return(struct ftrace_graph_ret *trace)
186{
187 struct trace_array *tr = irqsoff_trace;
188 struct trace_array_cpu *data;
189 unsigned long flags;
190 long disabled;
191 int cpu;
192 int pc;
193
194 cpu = raw_smp_processor_id();
195 if (likely(!per_cpu(tracing_cpu, cpu)))
196 return;
197
198 local_save_flags(flags);
199 /* slight chance to get a false positive on tracing_cpu */
200 if (!irqs_disabled_flags(flags))
201 return;
202
203 data = tr->data[cpu];
204 disabled = atomic_inc_return(&data->disabled);
205
206 if (likely(disabled == 1)) {
207 pc = preempt_count();
208 __trace_graph_return(tr, trace, flags, pc);
209 }
210
211 atomic_dec(&data->disabled);
212}
213
214static void irqsoff_trace_open(struct trace_iterator *iter)
215{
216 if (is_graph())
217 graph_trace_open(iter);
218
219}
220
221static void irqsoff_trace_close(struct trace_iterator *iter)
222{
223 if (iter->private)
224 graph_trace_close(iter);
225}
226
227#define GRAPH_TRACER_FLAGS (TRACE_GRAPH_PRINT_CPU | \
228 TRACE_GRAPH_PRINT_PROC)
229
230static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
231{
232 u32 flags = GRAPH_TRACER_FLAGS;
233
234 if (trace_flags & TRACE_ITER_LATENCY_FMT)
235 flags |= TRACE_GRAPH_PRINT_DURATION;
236 else
237 flags |= TRACE_GRAPH_PRINT_ABS_TIME;
238
239 /*
240 * In graph mode call the graph tracer output function,
241 * otherwise go with the TRACE_FN event handler
242 */
243 if (is_graph())
244 return print_graph_function_flags(iter, flags);
245
246 return TRACE_TYPE_UNHANDLED;
247}
248
249static void irqsoff_print_header(struct seq_file *s)
250{
251 if (is_graph()) {
252 struct trace_iterator *iter = s->private;
253 u32 flags = GRAPH_TRACER_FLAGS;
254
255 if (trace_flags & TRACE_ITER_LATENCY_FMT) {
256 /* print nothing if the buffers are empty */
257 if (trace_empty(iter))
258 return;
259
260 print_trace_header(s, iter);
261 flags |= TRACE_GRAPH_PRINT_DURATION;
262 } else
263 flags |= TRACE_GRAPH_PRINT_ABS_TIME;
264
265 print_graph_headers_flags(s, flags);
266 } else
267 trace_default_header(s);
268}
269
270static void
271trace_graph_function(struct trace_array *tr,
272 unsigned long ip, unsigned long flags, int pc)
273{
274 u64 time = trace_clock_local();
275 struct ftrace_graph_ent ent = {
276 .func = ip,
277 .depth = 0,
278 };
279 struct ftrace_graph_ret ret = {
280 .func = ip,
281 .depth = 0,
282 .calltime = time,
283 .rettime = time,
284 };
285
286 __trace_graph_entry(tr, &ent, flags, pc);
287 __trace_graph_return(tr, &ret, flags, pc);
288}
289
290static void
291__trace_function(struct trace_array *tr,
292 unsigned long ip, unsigned long parent_ip,
293 unsigned long flags, int pc)
294{
295 if (!is_graph())
296 trace_function(tr, ip, parent_ip, flags, pc);
297 else {
298 trace_graph_function(tr, parent_ip, flags, pc);
299 trace_graph_function(tr, ip, flags, pc);
300 }
301}
302
303#else
304#define __trace_function trace_function
305
306static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
307{
308 return -EINVAL;
309}
310
311static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
312{
313 return -1;
314}
315
316static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
317{
318 return TRACE_TYPE_UNHANDLED;
319}
320
321static void irqsoff_graph_return(struct ftrace_graph_ret *trace) { }
322static void irqsoff_print_header(struct seq_file *s) { }
323static void irqsoff_trace_open(struct trace_iterator *iter) { }
324static void irqsoff_trace_close(struct trace_iterator *iter) { }
325#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
326
111/* 327/*
112 * Should this new latency be reported/recorded? 328 * Should this new latency be reported/recorded?
113 */ 329 */
@@ -150,7 +366,7 @@ check_critical_timing(struct trace_array *tr,
150 if (!report_latency(delta)) 366 if (!report_latency(delta))
151 goto out_unlock; 367 goto out_unlock;
152 368
153 trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); 369 __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
154 /* Skip 5 functions to get to the irq/preempt enable function */ 370 /* Skip 5 functions to get to the irq/preempt enable function */
155 __trace_stack(tr, flags, 5, pc); 371 __trace_stack(tr, flags, 5, pc);
156 372
@@ -172,7 +388,7 @@ out_unlock:
172out: 388out:
173 data->critical_sequence = max_sequence; 389 data->critical_sequence = max_sequence;
174 data->preempt_timestamp = ftrace_now(cpu); 390 data->preempt_timestamp = ftrace_now(cpu);
175 trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); 391 __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
176} 392}
177 393
178static inline void 394static inline void
@@ -204,7 +420,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
204 420
205 local_save_flags(flags); 421 local_save_flags(flags);
206 422
207 trace_function(tr, ip, parent_ip, flags, preempt_count()); 423 __trace_function(tr, ip, parent_ip, flags, preempt_count());
208 424
209 per_cpu(tracing_cpu, cpu) = 1; 425 per_cpu(tracing_cpu, cpu) = 1;
210 426
@@ -238,7 +454,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)
238 atomic_inc(&data->disabled); 454 atomic_inc(&data->disabled);
239 455
240 local_save_flags(flags); 456 local_save_flags(flags);
241 trace_function(tr, ip, parent_ip, flags, preempt_count()); 457 __trace_function(tr, ip, parent_ip, flags, preempt_count());
242 check_critical_timing(tr, data, parent_ip ? : ip, cpu); 458 check_critical_timing(tr, data, parent_ip ? : ip, cpu);
243 data->critical_start = 0; 459 data->critical_start = 0;
244 atomic_dec(&data->disabled); 460 atomic_dec(&data->disabled);
@@ -347,19 +563,32 @@ void trace_preempt_off(unsigned long a0, unsigned long a1)
347} 563}
348#endif /* CONFIG_PREEMPT_TRACER */ 564#endif /* CONFIG_PREEMPT_TRACER */
349 565
350static void start_irqsoff_tracer(struct trace_array *tr) 566static int start_irqsoff_tracer(struct trace_array *tr, int graph)
351{ 567{
352 register_ftrace_function(&trace_ops); 568 int ret = 0;
353 if (tracing_is_enabled()) 569
570 if (!graph)
571 ret = register_ftrace_function(&trace_ops);
572 else
573 ret = register_ftrace_graph(&irqsoff_graph_return,
574 &irqsoff_graph_entry);
575
576 if (!ret && tracing_is_enabled())
354 tracer_enabled = 1; 577 tracer_enabled = 1;
355 else 578 else
356 tracer_enabled = 0; 579 tracer_enabled = 0;
580
581 return ret;
357} 582}
358 583
359static void stop_irqsoff_tracer(struct trace_array *tr) 584static void stop_irqsoff_tracer(struct trace_array *tr, int graph)
360{ 585{
361 tracer_enabled = 0; 586 tracer_enabled = 0;
362 unregister_ftrace_function(&trace_ops); 587
588 if (!graph)
589 unregister_ftrace_function(&trace_ops);
590 else
591 unregister_ftrace_graph();
363} 592}
364 593
365static void __irqsoff_tracer_init(struct trace_array *tr) 594static void __irqsoff_tracer_init(struct trace_array *tr)
@@ -372,12 +601,14 @@ static void __irqsoff_tracer_init(struct trace_array *tr)
372 /* make sure that the tracer is visible */ 601 /* make sure that the tracer is visible */
373 smp_wmb(); 602 smp_wmb();
374 tracing_reset_online_cpus(tr); 603 tracing_reset_online_cpus(tr);
375 start_irqsoff_tracer(tr); 604
605 if (start_irqsoff_tracer(tr, is_graph()))
606 printk(KERN_ERR "failed to start irqsoff tracer\n");
376} 607}
377 608
378static void irqsoff_tracer_reset(struct trace_array *tr) 609static void irqsoff_tracer_reset(struct trace_array *tr)
379{ 610{
380 stop_irqsoff_tracer(tr); 611 stop_irqsoff_tracer(tr, is_graph());
381 612
382 if (!save_lat_flag) 613 if (!save_lat_flag)
383 trace_flags &= ~TRACE_ITER_LATENCY_FMT; 614 trace_flags &= ~TRACE_ITER_LATENCY_FMT;
@@ -409,9 +640,15 @@ static struct tracer irqsoff_tracer __read_mostly =
409 .start = irqsoff_tracer_start, 640 .start = irqsoff_tracer_start,
410 .stop = irqsoff_tracer_stop, 641 .stop = irqsoff_tracer_stop,
411 .print_max = 1, 642 .print_max = 1,
643 .print_header = irqsoff_print_header,
644 .print_line = irqsoff_print_line,
645 .flags = &tracer_flags,
646 .set_flag = irqsoff_set_flag,
412#ifdef CONFIG_FTRACE_SELFTEST 647#ifdef CONFIG_FTRACE_SELFTEST
413 .selftest = trace_selftest_startup_irqsoff, 648 .selftest = trace_selftest_startup_irqsoff,
414#endif 649#endif
650 .open = irqsoff_trace_open,
651 .close = irqsoff_trace_close,
415}; 652};
416# define register_irqsoff(trace) register_tracer(&trace) 653# define register_irqsoff(trace) register_tracer(&trace)
417#else 654#else
@@ -435,9 +672,15 @@ static struct tracer preemptoff_tracer __read_mostly =
435 .start = irqsoff_tracer_start, 672 .start = irqsoff_tracer_start,
436 .stop = irqsoff_tracer_stop, 673 .stop = irqsoff_tracer_stop,
437 .print_max = 1, 674 .print_max = 1,
675 .print_header = irqsoff_print_header,
676 .print_line = irqsoff_print_line,
677 .flags = &tracer_flags,
678 .set_flag = irqsoff_set_flag,
438#ifdef CONFIG_FTRACE_SELFTEST 679#ifdef CONFIG_FTRACE_SELFTEST
439 .selftest = trace_selftest_startup_preemptoff, 680 .selftest = trace_selftest_startup_preemptoff,
440#endif 681#endif
682 .open = irqsoff_trace_open,
683 .close = irqsoff_trace_close,
441}; 684};
442# define register_preemptoff(trace) register_tracer(&trace) 685# define register_preemptoff(trace) register_tracer(&trace)
443#else 686#else
@@ -463,9 +706,15 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
463 .start = irqsoff_tracer_start, 706 .start = irqsoff_tracer_start,
464 .stop = irqsoff_tracer_stop, 707 .stop = irqsoff_tracer_stop,
465 .print_max = 1, 708 .print_max = 1,
709 .print_header = irqsoff_print_header,
710 .print_line = irqsoff_print_line,
711 .flags = &tracer_flags,
712 .set_flag = irqsoff_set_flag,
466#ifdef CONFIG_FTRACE_SELFTEST 713#ifdef CONFIG_FTRACE_SELFTEST
467 .selftest = trace_selftest_startup_preemptirqsoff, 714 .selftest = trace_selftest_startup_preemptirqsoff,
468#endif 715#endif
716 .open = irqsoff_trace_open,
717 .close = irqsoff_trace_close,
469}; 718};
470 719
471# define register_preemptirqsoff(trace) register_tracer(&trace) 720# define register_preemptirqsoff(trace) register_tracer(&trace)
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 8e46b3323cdc..2404c129a8c9 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -253,7 +253,7 @@ void *trace_seq_reserve(struct trace_seq *s, size_t len)
253 void *ret; 253 void *ret;
254 254
255 if (s->full) 255 if (s->full)
256 return 0; 256 return NULL;
257 257
258 if (len > ((PAGE_SIZE - 1) - s->len)) { 258 if (len > ((PAGE_SIZE - 1) - s->len)) {
259 s->full = 1; 259 s->full = 1;
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 5fca0f51fde4..a55fccfede5d 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -50,8 +50,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
50} 50}
51 51
52static void 52static void
53probe_sched_switch(struct rq *__rq, struct task_struct *prev, 53probe_sched_switch(struct task_struct *prev, struct task_struct *next)
54 struct task_struct *next)
55{ 54{
56 struct trace_array_cpu *data; 55 struct trace_array_cpu *data;
57 unsigned long flags; 56 unsigned long flags;
@@ -109,7 +108,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
109} 108}
110 109
111static void 110static void
112probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success) 111probe_sched_wakeup(struct task_struct *wakee, int success)
113{ 112{
114 struct trace_array_cpu *data; 113 struct trace_array_cpu *data;
115 unsigned long flags; 114 unsigned long flags;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0271742abb8d..8052446ceeaa 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -107,8 +107,7 @@ static void probe_wakeup_migrate_task(struct task_struct *task, int cpu)
107} 107}
108 108
109static void notrace 109static void notrace
110probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev, 110probe_wakeup_sched_switch(struct task_struct *prev, struct task_struct *next)
111 struct task_struct *next)
112{ 111{
113 struct trace_array_cpu *data; 112 struct trace_array_cpu *data;
114 cycle_t T0, T1, delta; 113 cycle_t T0, T1, delta;
@@ -200,7 +199,7 @@ static void wakeup_reset(struct trace_array *tr)
200} 199}
201 200
202static void 201static void
203probe_wakeup(struct rq *rq, struct task_struct *p, int success) 202probe_wakeup(struct task_struct *p, int success)
204{ 203{
205 struct trace_array_cpu *data; 204 struct trace_array_cpu *data;
206 int cpu = smp_processor_id(); 205 int cpu = smp_processor_id();
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 1cc9858258b3..250e7f9bd2f0 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -29,7 +29,7 @@ static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
29 struct trace_entry *entry; 29 struct trace_entry *entry;
30 unsigned int loops = 0; 30 unsigned int loops = 0;
31 31
32 while ((event = ring_buffer_consume(tr->buffer, cpu, NULL))) { 32 while ((event = ring_buffer_consume(tr->buffer, cpu, NULL, NULL))) {
33 entry = ring_buffer_event_data(event); 33 entry = ring_buffer_event_data(event);
34 34
35 /* 35 /*
@@ -255,7 +255,8 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
255/* Maximum number of functions to trace before diagnosing a hang */ 255/* Maximum number of functions to trace before diagnosing a hang */
256#define GRAPH_MAX_FUNC_TEST 100000000 256#define GRAPH_MAX_FUNC_TEST 100000000
257 257
258static void __ftrace_dump(bool disable_tracing); 258static void
259__ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode);
259static unsigned int graph_hang_thresh; 260static unsigned int graph_hang_thresh;
260 261
261/* Wrap the real function entry probe to avoid possible hanging */ 262/* Wrap the real function entry probe to avoid possible hanging */
@@ -266,7 +267,7 @@ static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace)
266 ftrace_graph_stop(); 267 ftrace_graph_stop();
267 printk(KERN_WARNING "BUG: Function graph tracer hang!\n"); 268 printk(KERN_WARNING "BUG: Function graph tracer hang!\n");
268 if (ftrace_dump_on_oops) 269 if (ftrace_dump_on_oops)
269 __ftrace_dump(false); 270 __ftrace_dump(false, DUMP_ALL);
270 return 0; 271 return 0;
271 } 272 }
272 273
generated by cgit v1.2.2 (git 2.25.0) at 2026-05-27 14:52:45 -0400